ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3129)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3300)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13439)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2385)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (420)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (80)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (165)
 Instrumentation interview questions  Instrumentation Interview Questions (2400)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (107)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (45)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (80)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1203)
Question
HOW TO CALCULATE THE BREAKING CAPACITY(LIKE 15KA,20KA) OF 
CIRCUTE BREAKER (MCB,MCCB,ACB)
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
it depend upon the value of current flows during short
circuit.
And the short circuit current depends upon the KVA rating of
transformer how supplies that particular load and transformer
percentage impedance.
 
Is This Answer Correct ?    36 Yes 9 No
Shan80
 
Answer
# 2
we must know load of perticular equipment.
For Ex. Our load in MVA is 50 MVA
Our system voltage(MCB,MCCB,ACB) is 440V.

I(Bre)= 50/(1.73x0.440)=65.6 =Approx 65KA.

Our load in MVA is 20 MVA
Our system voltage(MCB,MCCB,ACB) is 440V.

I(Bre)= 20/(1.73x0.440)=26.2 =Approx 25KA.
 
Is This Answer Correct ?    37 Yes 11 No
Jitesh Patel
 
 
 
Answer
# 3
it depends on the short circuit & full load of equipment 
Is This Answer Correct ?    16 Yes 14 No
Ashok
 
Answer
# 4
All above said suggestions are mere copy paste of something from wiki answer.its totally wrong.
Aforesaid calculations are to calculate rated current.
Short circuit analysis is to be done to calculate breaking capacity.
 
Is This Answer Correct ?    1 Yes 0 No
Mohammed Rafi
 
Answer
# 5
we must know load of perticular equipment.
For Ex. Our load in MVA is 50 MVA
Our system voltage(MCB,MCCB,ACB) is 440V.

I(Bre)= 50/(1.73x0.440)=65.6 =Approx 65KA.

Our load in MVA is 20 MVA
Our system voltage(MCB,MCCB,ACB) is 440V.

I(Bre)= 20/(1.73x0.440)=26.2 =Approx 25KA.
 
Is This Answer Correct ?    4 Yes 5 No
Hrusikesh Dehury
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
which is better 50 HZ supply or 60 HZ supply?   6
why ohms law does not obey semi-conducters?   2
what is the meaning of electrical maintenance?   2
6.6 KV /.415KV Step down trf. we can get 6.6 KV from primary by applying .415 KV secondary side by same TRF. Suzlon 3
what is the type of starter used in tube light?   2
IN CABLE TRENCH WHY FILL UP THE SAND. AND WHAT IS THE DIFFERENCE BETWEEN OVER HEAD AND UNDER GROUND LAYING THE CABLES Cable-Wireless 2
what is meant by phase &line voltage, how its differ from each other ?   5
Equal resistance of 100ohm each are connected to the arms of whestons bridge, which is supplied by 2v battery. The galvanometer can sense a current low as 1microAmp. What is the smallest resistance that can be measered. GATE 1
WHY 6.6KV MOTORS ARE STAR CONNECTED AND WHY NOT DELTA CONNECTED, Bhel 15
At what condition differential relay will act in transformer and ht motor? Equate 1
why transformer are rated in kva. Nalco 5
Why PT is fitted in incomer panel.....?   1
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com